Searched for: author:"Heimovaara, T.J."
(1 - 20 of 49)

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van Turnhout, A.G. (author), Oonk, Hans (author), Scharff, Heijo (author), Heimovaara, T.J. (author)
In order to reduce the environmental and financial burden for future generations, approaches are needed to shorten aftercare of landfills. Aeration of the waste-body is a promising approach, however, the poor understanding of transport of gas and water through a waste-body makes it difficult to design an effective aeration strategy. The aim of...
journal article 2020
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Zander, F. (author), Heimovaara, T.J. (author), Gebert, J. (author)
Purpose: The microbial turnover of sediment organic matter (OM) in ports and waterways impacts water quality, sonic depth finding and presumably also rheological properties as well as greenhouse gas emissions, especially if organic carbon is released as methane. As a consequence, sediment management practices as a whole are affected. This...
journal article 2020
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Zhou, Jianchao (author), Laumann, S.J. (author), Heimovaara, T.J. (author)
Using naturally occurring processes to modify the engineering properties of the subsurface has received increasing attention from industry and research communities as they aid in the development of cost-effective, robust and sustainable engineering technologies. In line with this trend, we propose to use precipitates of aluminum (Al) and organic...
journal article 2019
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Thouement, H.A.A. (author), Kuder, Tomasz (author), Heimovaara, T.J. (author), van Breukelen, B.M. (author)
Back-diffusion of chlorinated ethenes (CEs) from low-permeability layers (LPLs) causes contaminant persistence long after the primary spill zones have disappeared. Naturally occurring degradation in LPLs lowers remediation time frames, but its assessment through sediment sampling is prohibitive in conventional remediation projects. Scenario...
journal article 2019
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Pham, P.V. (author), van Paassen, L.A. (author), van der Star, Wouter R.L. (author), Heimovaara, T.J. (author)
Microbially induced carbonate precipitation (MICP) through denitrification can potentially be applied as a bio-based ground improvement technique. Two strategies involving multiple batch treatments in a modified triaxial test setup were used to study the process efficiency. Both strategies aim to achieve 1 weight percentage (% by weight) of...
journal article 2018
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Wijdeveld, A.J. (author), Schipper, C. A. (author), Heimovaara, T.J. (author)
In this study the spatial distribution of dissolved metals in surface water is studied at nine locations in Lake Ketelmeer (the Netherlands). The measured dissolved metal concentrations are combined with the local water quality parameters for salinity, pH, alkalinity and DOC to calculate a FIAM Free Ion Activity Model (FIAM) and the Biotic...
journal article 2018
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van Turnhout, A.G. (author), Brandstätter, Christian (author), Kleerebezem, R. (author), Fellner, Johann (author), Heimovaara, T.J. (author)
Long-term emissions of Municipal Solid Waste (MSW) landfills are a burden for future generations because of the required long-term aftercare. To shorten aftercare, treatment methods have to be developed that reduce long-term emissions. A treatment method that reduces emissions at a lysimeter scale is re-circulation of leachate. However, its...
journal article 2018
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Zhou, J. (author), Laumann, S. (author), Heimovaara, T.J. (author)
conference paper 2017
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Konstantaki, L.A. (author), Ghose, R. (author), Draganov, D.S. (author), Heimovaara, T.J. (author)
The knowledge of the distribution of leachate and gas in a municipal landfill is of vital importance to the landfill operators performing improved landfill treatments and for environmental protection and efficient biogas extraction. We have explored the potential of using the velocity fields of seismic S- and P-waves to delineate the wet and...
journal article 2016
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van Turnhout, A.G. (author), Kleerebezem, R. (author), Heimovaara, T.J. (author)
Reliable prediction of the long-term behavior of environmental systems such as Municipal Solid Waste (MSW) landfills is challenging. While many driving forces influence this behavior, characterization of them is limited by measurement techniques. Therefore, a model structure for reliable prediction needs to optimally combine all measured...
journal article 2016
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Laumann, S.J. (author), Zhou, J. (author), Heimovaara, T.J. (author)
The utilization of natural processes for engineering purposes has been widely discussed in recent years since they might enable the development of cost-effective, robust and environmentally compatible engineering technologies. Biomineralization is one of the many possible biogeochemical processes that is currently investigated in detail. We...
abstract 2016
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Pham, P.V. (author), Nakano, A. (author), van der Star, WRL (author), Heimovaara, T.J. (author), van Paassen, L.A. (author)
The process of microbially induced carbonate precipitation (MICP) by denitrification was investigated in relation to its potential use as a ground improvement method. Liquid batch experiments indicated that the substrate solution had an optimum carbon–nitrogen ratio of 1·6 and confirmed that combining nitrate reduction and calcium carbonate...
journal article 2016
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Afanasyev, M. (author), Huisman, H. (author), Van Paassen, L.A. (author), Heimovaara, T.J. (author)
conference paper 2015
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Konstantaki, L.A. (author), Draganov, D.S. (author), Ghose, R. (author), Heimovaara, T.J. (author)
In this study we investigate the application of seismic interferometry (SI) to seismic reflection data recorded over a landfill. Landfills represent strongly heterogeneous subsurfaces making the seismic reflection imaging challenging. We show that SI improves the imaging of high-density areas, which create scattering events in the recorded data....
conference paper 2015
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Heimovaara, T.J. (author), Oonk, H. (author), Scharf, H. (author)
conference paper 2015
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Heimovaara, T.J. (author), Bun, A. (author), Van Turnhout, A.G. (author)
In order to develop novel approaches for reducing the after-care of Municipal Solid Waste (MSW) sanitary landfills methods are required with which we can quantify the emission potential present in waste bodies. Currently full-scale experiments are being prepared at three Dutch landfills based on enhanced infiltration by irrigation and leachate...
conference paper 2015
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Van Turnhout, A.G. (author), Kleerebezem, R. (author), Heimovaara, T.J. (author)
In this study, we aim to validate the reaction network with an idealized experiment. We want to show that 1) rate controlling parameters are identifiable from the measured data by inverse modeling, and 2) that this network is able to predict the measured emissions in the experiment given the initial conditions. In the experiment, cabbage is used...
conference paper 2015
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Baviskar, S.M. (author), Heimovaara, T.J. (author)
We believe the unsaturated and heterogeneous nature of landfills leads to the emergence of preferential pathways of water and dissolved compounds through the waste body. In this research we explore the origin of preferential flow in a porous media with a deterministic numerical model. In this model water flow is modeled with the Richards’...
conference paper 2015
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Zhou, J. (author), Van Turnhout, A.G. (author), Heimovaara, T.J. (author), Afanasyev, M. (author)
The spatial and temporal distribution of precipitated minerals is one of the key factors governing various processes in the sub-surface environment, including microbially influenced corrosion (MIC) (Huang, 2002), bio-cementation (van Paassen et al., 2010) and sediment diagenesis (Paraska et al., 2014). The mineral precipitation not only affects...
conference paper 2015
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Van Turnhout, A.G. (author), Brandstatter, C. (author), Kleerebezem, R. (author), Heimovaara, T.J. (author)
The aim of our study is to investigate previously mentioned aspects with scenario analyses via a mechanistic biogeochemical reaction network model that contains the emission controlling reactions. In order to find such a network, we apply the gray modeling toolbox developed by van Turnhout et al. (2015) on a measured dataset used in the study of...
conference paper 2015
Searched for: author:"Heimovaara, T.J."
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